you're not gonna make massive changes to your physique in a short time and still retain them. however, i believe there is ongoing research into the long term growth effects of AAS (it's possible that the gene expression is actually long lasting, FWIW).
if you're looking for a cycle, then i'd do something like this... it's quick, effective and easy to adjust.
Test Prop (50-100 mg/day)
A-dex (.25 mg/EOD)
HCG (500 IU/wk)
Nolvadex (20 mg/night)
also, the likelihood of any permanent shutdown is pretty low with that protocol, as well...